F# snippets: adds analyzer ignore snippets

[TheAngryByrd]

Creates snippets based on https://ionide.io/FSharp.Analyzers.SDK/content/getting-started/Ignore%20Analyzer%20Hits.html

analyzer-snippers.mp4

[Copilot]

Pull Request Overview

This PR adds F# analyzer ignore snippets to enable developers to suppress analyzer warnings directly in their code. The changes introduce two new code snippets for controlling F# analyzer behavior and remove an unnecessary blank line.

• Added snippet for ignoring F# analyzer warnings with multiple scope options (ignore-line, ignore-line-next, ignore-region-start, ignore-file)
• Added dedicated snippet for ending an analyzer ignore region
• Removed extraneous blank line for cleaner formatting

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